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- Question
When a router is connected to a Frame Relay WAN link using a serial DTE interface, how is the clock rate determined?
Options- A. Supplied by the CSU/DSU
- B. By the far end router
- C. By the clock rate command
- D. By the Physical layer bit stream timing
- Correct Answer
- Supplied by the CSU/DSU
ExplanationClocking on a serial interface is always provided by the CSU/DSU (DCE device). However, if you do not have a CSU/DSU in your nonproduction test environment, then you need to supply clocking with the clock rate command on the serial interface of the router with the DCE cable attached. - 1. Which command is required for connectivity in a Frame Relay network if Inverse ARP is not operational?
Options- A. frame-relay arp
- B. frame-relay map
- C. frame-relay interface-dci
- D. frame-relay lmi-type Discuss
- 2. Which of the following uses ATM as the Data Link layer protocol that's terminated at what's known as the DSLAM?
Options- A. DSL
- B. PPPoE
- C. Frame Relay
- D. Dedicated T1
- E. Wireless Discuss
- 3. Which of the following encapsulates PPP frames in Ethernet frames and uses common PPP features like authentication, encryption, and compression?
Options- A. PPP
- B. PPPoA
- C. PPPoE
- D. Token Ring Discuss
- 4. You need to configure a router for a Frame Relay connection to a non-Cisco router. Which of the following commands will prepare the WAN interface of the router for this connection?
Options- A. Router(config-if)#encapsulation frame-relay q933a
- B. Router(config-if)#encapsulation frame-relay ansi
- C. Router(config-if)#encapsulation frame-relay ietf
- D. Router(config-if)#encapsulation frame-relay cisco Discuss
- 5. Which of the following describes the creation of private networks across the Internet, enabling privacy and tunneling of non-TCP/IP protocols?
Options- A. HDLC
- B. Cable
- C. VPN
- D. IPSec
- E. xDSL Discuss
- 6. Which command will display the CHAP authentication process as it occurs between two routers in the network?
Options- A. show chap authentication
- B. show interface serial 0
- C. debug ppp authentication
- D. debug chap authentication Discuss
- 7. How should a router that is being used in a Frame Relay network be configured to keep split horizon issues from preventing routing updates?
Options- A. Configure a separate subinterface for each PVC with a unique DLCI and subnet assigned to the subinterface.
- B. Configure each Frame Relay circuit as a point-to-point line to support multicast and broadcast traffic.
- C. Configure many subinterfaces in the same subnet.
- D. Configure a single subinterface to establish multiple PVC connections to multiple remote router interfaces. Discuss
- 8. Which of the following command options are displayed when you use the Router# show frame-relay? command?
- dlci
- neighbors
- lmi
- pvc
- map
Options- A. 1 only
- B. 2 and 4
- C. 3, 4 and 5
- D. All of the above Discuss
- 9. Which of the following are unique characteristics of half-duplex Ethernet when compared to full-duplex Ethernet?
- Half-duplex Ethernet operates in a shared collision domain.
- Half-duplex Ethernet operates in a private collision domain.
- Half-duplex Ethernet has higher effective throughput.
- Half-duplex Ethernet has lower effective throughput.
Options- A. 2 only
- B. 1,2 and 3
- C. 1 and 4
- D. 4 only Discuss
- 10. Which of the following are types of flow control?
- Buffering
- Cut-through
- Windowing
- Congestion avoidance
Options- A. 1 and 2
- B. 1, 3 and 4
- C. 2 only
- D. 3 only Discuss
Wide Area Networks problems
Search Results
Correct Answer: frame-relay map
Explanation:
If you have a router in your Frame Relay network that does not support IARP, you must create Frame Relay maps on your router, which provide known DLCI-to-IP address mappings.
Correct Answer: DSL
Explanation:
ATM is the Data-Link layer protocol that's typically used over the DSL layer 1 connection from the CPE and terminated at what's known as the DSLAM-an ATM switch that contains DSL interface cards, or ATU-Cs.
Correct Answer: PPPoE
Explanation:
PPPoE encapsulates PPP frames in Ethernet frames and uses common PPP features like authentication, encryption, and compression. PPPoA is used for ATM.
Correct Answer: Router(config-if)#encapsulation frame-relay ietf
Explanation:
If you have a Cisco router on one side of a Frame Relay network and a non-Cisco router on the other side, you would need to use the Frame Relay encapsulation type of IETF. The default is Cisco encapsulation, which means that a Cisco router must be on both sides of the Frame Relay network.
Correct Answer: VPN
Explanation:
A allows the creation of private networks across the Internet, enabling privacy and tunneling of non-TCP/IP protocols. A VPN can be set up across any type of link.
Correct Answer: debug ppp authentication
Explanation:
The command
debug ppp authentication will show you the authentication process that PPP uses between point-to-point connections.
Correct Answer: Configure a separate subinterface for each PVC with a unique DLCI and subnet assigned to the subinterface.
Explanation:
If you have a serial port configured with multiple DLCIs connected to multiple remote sites, split horizon rules, stop route updates received on an interface from being sent out the same interface. By creating subinterfaces for each PVC, you can avoid the split horizon issues when using Frame Relay.
Correct Answer: 3, 4 and 5
Explanation:
The
show frame-relay ? command provides many options, but the options available in this question are
lmi,
pvc, and
map.
Correct Answer: 1 and 4
Explanation:
Unlike full duplex, half-duplex Ethernet operates in a shared collision domain, and it has a lower effective throughput than full duplex.
Correct Answer: 1, 3 and 4
Explanation:
The common types of flow control are buffering, windowing, and congestion avoidance.
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